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| author | Wenwen Wang <wenwen@cs.uga.edu> | 2019-08-18 13:54:46 -0500 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2019-08-20 13:44:45 -0400 |
| commit | 2323d7baab2b18d87d9bc267452e387aa9f0060a (patch) | |
| tree | 0b9297714a43ed975cbd4062ccbe5bfcb273a4ef | |
| parent | b08afa064c320e5d85cdc27228426b696c4c8dae (diff) | |
| download | linux-2323d7baab2b18d87d9bc267452e387aa9f0060a.tar.gz linux-2323d7baab2b18d87d9bc267452e387aa9f0060a.tar.bz2 linux-2323d7baab2b18d87d9bc267452e387aa9f0060a.zip | |
infiniband: hfi1: fix memory leaks
In fault_opcodes_write(), 'data' is allocated through kcalloc(). However,
it is not deallocated in the following execution if an error occurs,
leading to memory leaks. To fix this issue, introduce the 'free_data' label
to free 'data' before returning the error.
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Acked-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Link: https://lore.kernel.org/r/1566154486-3713-1-git-send-email-wenwen@cs.uga.edu
Signed-off-by: Doug Ledford <dledford@redhat.com>
| -rw-r--r-- | drivers/infiniband/hw/hfi1/fault.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/infiniband/hw/hfi1/fault.c b/drivers/infiniband/hw/hfi1/fault.c index 814324d17295..986c12153e62 100644 --- a/drivers/infiniband/hw/hfi1/fault.c +++ b/drivers/infiniband/hw/hfi1/fault.c @@ -141,12 +141,14 @@ static ssize_t fault_opcodes_write(struct file *file, const char __user *buf, if (!data) return -ENOMEM; copy = min(len, datalen - 1); - if (copy_from_user(data, buf, copy)) - return -EFAULT; + if (copy_from_user(data, buf, copy)) { + ret = -EFAULT; + goto free_data; + } ret = debugfs_file_get(file->f_path.dentry); if (unlikely(ret)) - return ret; + goto free_data; ptr = data; token = ptr; for (ptr = data; *ptr; ptr = end + 1, token = ptr) { @@ -195,6 +197,7 @@ static ssize_t fault_opcodes_write(struct file *file, const char __user *buf, ret = len; debugfs_file_put(file->f_path.dentry); +free_data: kfree(data); return ret; } |